XML 40 R36.htm IDEA: XBRL DOCUMENT v3.19.3
Intangible Assets - Schedule of Intangible Assets (Detail) - USD ($)
12 Months Ended
Sep. 30, 2019
Sep. 30, 2018
Sep. 30, 2017
Intangible Assets Net Excluding Goodwill [Abstract]      
Intangible assets subject to amortization, beginning balance $ 18,764,010    
Intangible assets subject to amortization, Amortization (1,700,430) $ (1,700,429) $ (1,700,429)
Intangible assets subject to amortization, ending balance $ 17,063,580 $ 18,764,010